The plight of the overcards

[Vehn]

$15/$30. Loud loose aggressive straddles. He came to play hands but he doesn't get ridiculously out of line. Two poor loose players call the 2 bets. I 3-bet on the button with KQ offsuit. Blinds fold and the straddler now makes it 4 bets and everyone calls. From the way he's talking I'm pretty sure he has something resembling a real hand, i.e. AQ/TT at least. Flop is 8 8 4 rainbow, straddler bets, both limpers call. I feel any real strength from the limpers. Do I have a call here getting around 20:1?